guess the aircraft

The top speed for the world’s fastest automobile is 280mph and and the ______ ________ _ has an average speed of about 648mph, what is this aircraft?

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I want to say Convair CV-990…Problem is I’m not sure if it can hit 648. I know it can hit 615…

Make that 990 not 880.

The average speed is 648, the top speed is 700 (mph)

And no, think more modern.


Answer is Cessna Citation X